I for one enjoy the control
I think it's alot better than having keys for punch/kick. I liked the graphics, except the zombies were kind of monotonous [always blue and not much variety in looks], and the stuff in the levels looked pretty much all the same on all the floors [or at least all the floors I could get to, but I got pretty dang far.]
If you want to add anything to the game, my suggestion would be a sort of perk system. Kinda like Fallout 3. Like, more knockback, or more stamina, or maybe a chance to blow up the zombie you're hitting. Stuff like that would be cool.
I ran into an annoying thing though, it might just be me lagging, but often the effect of my attacks are delayed. Like, I'll be flailing my fist on someone and they wont get hit until a whole 2 seconds goes by. It really effects me when they'll lunge for me, and I'll punch them in the face, but they go right though my fist and get me anyways. Again, it might just be me, but if it isn't just me then I hope it gets fixed or something.